Durability of AZ31 magnesium biodegradable alloys polydopamine aided.Part 2:Ageing in Hank’s solution  

作　　者：Anna Carangelo Annalisa Acquesta Tullio Monetta 

机构地区：[1]Department of Chemical Engineering,Materials and Industrial Production,University of Napoli Federico II,Piazzale Tecchio 80,80125 Napoli,Italy

出　　处：《Journal of Magnesium and Alloys》2019年第2期218-226,共9页镁合金学报（英文）

摘　　要：Magnesium alloys are candidates as biodegradable medical materials due to their biocompatibility and favorable mechanical properties.Unfortunately,the high corrosion rate in physiological media and the release of hydrogen,limit their widespread use in biomedical applications.In this work,an intermediate coating based on polydopamine(PDOPA),between Mg substrate and an organic coating,was used to decreasing the degradation rate of AZ31 magnesium alloy,during the long-term exposure in simulated body fluid.Electrochemical Impedance Spectroscopy measurements were carried out to study the corrosion resistance of samples.Results demonstrated that the PDOPA interlayer determined the reduction of the substrate degradation rate.The results were interpreted supposing a synergistic effect which occurred when PDOPA and the organic coating were used together.

关 键 词：POLYDOPAMINE AZ31 Magnesium alloy Electrochemical characterization Degradation rate 

分 类 号：TG1[金属学及工艺—金属学]